US97952A

US97952A - Improvement in propellers

Info

Publication number: US97952A
Authority: US
Publication date: 1869-12-14
Anticipated expiration: 1886-12-14

Description

`t man new aunt @Milne Letters Patent No. 97,952, da'telZDecember 14, 18695 I'MPROVEMENT IN PROPELLERS.

Th Schedule referred to in these Letters Patent and making part of the same.

lTo all whom it may concern Be it known that I, SIMON B. Mourir, of the city and county of San Francisco, State of California, have l invented an Improved Iropeller-heel and I do here by declare the following description and accompanying drawings `are sutcient to enable any person skilled in y the art or science to which itmost nearly appertains,

to make and use my said invention or improvements without further invention or experiment.

My invention relates to suoli improvements in propeller-wheels for vessels as will eiieetnally do away with the loss of` power consequent on the use of the ordinaryv paddlewheel, owing to the `pounding and l lifting of the water, asthe buckets enter and emerge tion, in which- A represents the propeller-shaft. t

The wheelsB and B are firmly secured to the shai't, at the proper distanceapart, and `may be made of an desired pattern or form, having a rim, D D.

Between the outer rims D 1),of the two wheels,- I place aycoutinnous'spiral or serew-shaped piece of metal, E, which extends entirelyaround thewheels B and llhis screw` is cut from met-al, so as to leave a rim or screw-blade, of the proper width to act as buckets or paddles when the wheel is revolved in the water, and, when extended aroundbetween the wheels, acire'ular opening will be left, passing entirely'around inside the screw.

The rims D D' of the wheels `B` and C should be united to this circular screw at about its middle, so

that one `halt` of the screw will be inside `the rims, while the other half is outside.

In driving this wheel through the water, it makes no di'iierence whether the entire diameterof the screw is submerged or not.

lVhen the entire diameter is beneath the surice of' the water, the water will follow the screw as it passes through it, thus giving aconstant and steady pre sure at all times, while, after the screw has emerged1 it will carry no water with it, as it would naturally iai from thesloping side of the screw as the wheel lturned. The same would be the effect as the screw entered the water, thus doing away with the lifting and pounding which always accompany the use of the flat or'horizontal buckets.

The spires of the screw` may be Vmade as liu' apart as desired, and in a wheel intended for a fast-running wheel, it would be better to give the screw long spres, as the resistance would be less, while the peculiar motion of the screw will give a greater speed for the power employed than any other form of buckets.

The buckets need not heeontinuens, but may be each made separate, and curved, and attached in such a manner that if complet-ed or made continuous, a perfect spiral or screw would be formed, and when constructed in this manner, the wheel would give the same eeot as when the same was continuous.

The action of the screw in the water will be similar to that employed'n soulliug a boat with an oar, as the .screw m'ovesfrom side to side oi the wheel, and causes a similar driving-force to result. v i

What I'claim, and desire to secure by Letters Iatent, is` y The floats or buckets, formed by the convolutions of the circular spiral E, substantially as and for the purpose set forth. y l f In witness whereof', I have hereunto set my hand and seal. v Y

SIMON B. MOREY. [It s] iVitnesses: y

WM. GERLACH, Geo. H. S'raoNo.